This book covers one of the most controversial subjects in Italian historiography, namely the success or failure of the Church's policy during the counter-Reformation to exert rigorous control not only over theology but over all branches of knowledge. By drawing extensively upon newly-opened sources in the archive of the former Congregation of the Holy Office, generally known as the "Inquisition", it affords a more articulated and objective assessment of the effects of ecclesiastical censorship on religion and culture in early modern Italy.